Signal also offers features to keep your communications activity hidden. Screen Security stops a preview of Signal appearing ...

In multicellular organisms, growth factors, hormones, neurotransmitters, and extracellular matrix components are some of the many types of chemical signals cells use. These substances can exert ...

Several new targets have been proposed, including proteins essential in the protein secretion pathway such as the type I signal peptidase (SPase), indispensable for the release of the signal ...